Brother TD-4650TNWB User Manual page 32

4. The printer calibrates the sensor and detects the label length, prints the internal settings,
and then enters Dump Mode.
Note
To select the sensor for calibration, send the correct command to the printer:
For the Gap Sensor: send the GAP command

For the Black Mark Sensor: send the BLINE command

For more information about the available commands, see the FBPL Command Reference
Manual on your model's Manuals page at support.brother.com.
Self-test

Print the printer configuration after you run Gap/Black Mark Sensor calibration. The self-test
printout lists the printer's configuration and available memory, and can indicate if there is any
dot damage on the heater component.
Self-test printout
Model name
Firmware version
Firmware checksum
Printer serial number
Configuration file
System date
System time
Printed mileage (meter)
Cutting counter
Number of defective dots
Print speed (inch/sec)
Print density
Label size (inch)
Gap distance (inch)
Gap/Black Mark Sensor
sensitivity
Code page
Country code
28